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| package com.qefee.pj.testrecord;
import android.media.MediaPlayer; import android.media.MediaRecorder; import android.support.v7.app.AppCompatActivity; import android.os.Bundle; import android.util.Log; import android.view.View; import android.widget.Button; import android.widget.TextView;
import java.io.File; import java.io.IOException;
public class MainActivity extends AppCompatActivity {
private static final String TAG = "MainActivity";
* 开始录音按钮. */ Button startRecordButton; * 停止录音按钮. */ Button stopRecordButton; * 播放录音按钮. */ Button playRecordButton; * 停止播放录音按钮. */ Button stopPlayRecordButton; * 录音信息按钮. */ Button recordInfoButton; * 录音信息TextView. */ TextView recordInfoTextView;
* 播放器对象. */ private MediaPlayer mediaPlayer; * 录音器对象. */ private MediaRecorder mediaRecorder;
* 录音文件名. */ private String recordFileName; * 录音文件. */ private File recordFile;
@Override protected void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.activity_main);
recordFileName = "r.3gp"; recordFile = new File(getExternalCacheDir(), recordFileName);
startRecordButton = (Button) findViewById(R.id.startRecordButton); stopRecordButton = (Button) findViewById(R.id.stopRecordButton); playRecordButton = (Button) findViewById(R.id.playRecordButton); stopPlayRecordButton = (Button) findViewById(R.id.stopPlayRecordButton); recordInfoButton = (Button) findViewById(R.id.recordInfoButton);
recordInfoTextView = (TextView) findViewById(R.id.recordInfoTextView);
startRecordButton.setOnClickListener(new View.OnClickListener() { @Override public void onClick(View v) { try { mediaRecorder = new MediaRecorder(); mediaRecorder.setAudioSource(MediaRecorder.AudioSource.DEFAULT); mediaRecorder.setOutputFormat(MediaRecorder.OutputFormat.THREE_GPP); mediaRecorder.setOutputFile(recordFile.getAbsolutePath()); mediaRecorder.setAudioEncoder(MediaRecorder.AudioEncoder.AMR_NB); mediaRecorder.prepare(); mediaRecorder.start();
Log.i(TAG, "onClick: 录音开始"); } catch (IOException e) { Log.e(TAG, "onClick: 录音失败", e); } catch (IllegalStateException e) { Log.e(TAG, "onClick: 录音失败", e); } } });
stopRecordButton.setOnClickListener(new View.OnClickListener() { @Override public void onClick(View v) {
if (mediaRecorder != null) { try { mediaRecorder.stop(); mediaRecorder.release(); mediaRecorder = null;
Log.i(TAG, "onClick: 录音停止"); } catch (IllegalStateException e) { Log.e(TAG, "onClick: 录音状态不正确", e); } } else { Log.i(TAG, "onClick: 录音器没有准备好"); } } });
playRecordButton.setOnClickListener(new View.OnClickListener() { @Override public void onClick(View v) {
if (recordFile.exists()) { try { mediaPlayer = new MediaPlayer();
mediaPlayer.setDataSource(recordFile.getAbsolutePath()); mediaPlayer.prepare(); mediaPlayer.start();
Log.i(TAG, "onClick: 播放录音开始"); } catch (IOException e) { Log.e(TAG, "onClick: 播放录音失败", e); } } else { Log.i(TAG, "onClick: 没有录音文件"); }
} });
stopPlayRecordButton.setOnClickListener(new View.OnClickListener() { @Override public void onClick(View v) { if (mediaPlayer != null) { mediaPlayer.release(); mediaPlayer = null;
Log.i(TAG, "onClick: 停止播放录音"); } else { Log.i(TAG, "onClick: 播放器没有准备好"); } } });
recordInfoButton.setOnClickListener(new View.OnClickListener() { @Override public void onClick(View v) { if (mediaPlayer != null) { int milliseconds = mediaPlayer.getDuration();
recordInfoTextView.setText(String.valueOf(milliseconds));
Log.i(TAG, "onClick: 获取录音信息"); } else { Log.i(TAG, "onClick: 播放器没有准备好"); } } }); } }
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